Question

Documenti Student ID 4. Which of the following is true about the reaction quotient? . None of these answers are correct It relates the concentrations of products to reactants at any point in time. It can never be equal to the equilibrium constant. It is always equal to the equilibrium constant. It relates the ratio of the concentrations of products to reactants once the reaction has reached chemical equilibrium. . • 5. Which of the following is true about the equilibrium constant? • None of these answers are correct It is equal to the reaction quotient when chemical equilibrium has not been established. It is always equal to the reaction quotient. It relates the ratio of the concentrations of products to reactants before the reaction has reached chemical equilibrium. It relates the ratio of the concentrations of products to reactants once the reaction has reached chemical equilibrium.

Answer 1

4. For any General reaction : aA + bB $\rightleftharpoons$ cC + dD

Reaction quotient =

[C]* *[D]" [A]* * [B]*

where terms in square brackets represent concentration of the species at any instant of time. i.e Reaction quotient relates the concentration of products to the reactants at any instant of time. Also, it may or may not be equal to equilibrium constant at a particular instant of time.

Correct statement is : Reaction quotient relates the concentration of products to the reactants at any instant of time.

5. Equilibrium constant has the same relation as reaction quotient but only difference is that, the concentration terms in the relation are equilibrium concentrations. Hence, equilibrium constant relates the ratio of concentration of products to reactants once equilibrium is established. also, it is equal to reaction quotient only when equilibrium is established.

correct statement is : equilibrium constant relates the ratio of concentration of products to reactants once the reaction has reached chemical equilibrium